[Specifications] An indispensable partner for safety ziplines. The 5.4-foot spring brake helps reduce impact force on the rope, suitable for applications such as steel cable rigging and cargo lifting. Offers excellent performance in stretching and rebounding. Rubber size: 7 x 4 x 4 cm. [Extension Spring] This zipline spring brake features a 5.4-foot spring, longer than most similar products on the market. Provides a longer effective deceleration distance for improved and smoother deceleration performance. [Flexible and Durable] Constructed from stainless steel, offering high tensile strength and resistance to rust. Through multiple forging processes and strict quality control, the zipline spring brake ensures extended service life. [Special Silica Gel Buffer Plug] Features a star-shaped soft plug made of silica gel that is flexible, non-damaging to other components, and resistant to breakage. Precision manufacturing ensures consistent performance. Each spring has uniform pitch, clear texture, and fine craftsmanship for stable resilience. [Easy to Install] No tools required. Simply thread the cable through the green star-shaped silicone plugs at both ends. Color: As shown Material: Stainless steel + rubber Size: Total length 165 cm, spring outer diameter 2.5 cm Package Contents: 1 x Spring 2 x Silicone Plug Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement allowance: +/- 1–3 cm.